Steins;Gate Movie: Fuka Ryouiki no Déjà vu

A year after Rintarou Okabe finally reaches the Steins Gate world line, Kurisu Makise returns to Akihabara and reunites with the Future Gadget Laboratory. The peace they fought so hard to obtain should be secure, yet Okabe is increasingly overwhelmed by vivid memories of other world lines, as if the past refuses to stay erased.

Then Okabe begins slipping out of reality itself. When he disappears and everyone else's memories reshape around his absence, Kurisu is left clinging to the faint certainty that he existed. Saving the man who once crossed time for her may require Kurisu to break the very rule he begged her to follow and risk changing the past with her own hands.